#header {
    height: 50px;
    background-color: blue;
}
#searchBanner {
    float: left;
    left: 5%;
}
#miniLogoBox {
    float: left;
}
#searchBox {
    float: right;
}
#personalBox {
    float: right;
    right: 5%;
}
#invitationLink {
    float: left;
}
#userBox {
    float: right;
}
#usernameBox {
    float: left;
}
#logoutBox {
    float: right;
}